:root {
  --emerald: #10B981;
  --emerald-dark: #047857;
  --emerald-deep: #064E3B;
  --mint: #ECFDF5;
  --mint-soft: #D1FAE5;
  --text: #1F2937;
  --text-light: #6B7280;
  --bg: #FFFFFF;
  --border: #E5E7EB;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(180deg, var(--mint) 0%, var(--bg) 400px);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 60px 24px 80px;
}

.site-header {
  text-align: center;
  margin-bottom: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-block;
  background: var(--emerald);
  color: white;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 1px;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
  text-transform: uppercase;
  text-decoration: none;
}

h1 {
  font-size: 42px;
  font-weight: 800;
  color: var(--emerald-deep);
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.subtitle,
.meta {
  color: var(--text-light);
  font-size: 15px;
}

h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--emerald-deep);
  margin-top: 48px;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--emerald-dark);
  margin-top: 28px;
  margin-bottom: 10px;
}

p { margin-bottom: 16px; font-size: 16px; }

ul { margin: 0 0 20px 24px; }

li { margin-bottom: 8px; font-size: 16px; }

strong {
  color: var(--emerald-deep);
  font-weight: 600;
}

a {
  color: var(--emerald-dark);
  text-decoration: none;
  border-bottom: 1px solid var(--mint-soft);
  transition: border-color 0.2s;
}

a:hover { border-bottom-color: var(--emerald); }

.back-link {
  display: inline-block;
  margin-bottom: 32px;
  font-size: 15px;
  border: none;
}

.back-link:hover { color: var(--emerald); }

.site-footer {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-light);
  font-size: 14px;
}

.site-footer a {
  color: var(--emerald-dark);
  border: none;
}

@media (max-width: 600px) {
  .container { padding: 40px 18px 60px; }
  h1 { font-size: 32px; }
  h2 { font-size: 22px; }
}